There are two businesses currently releasing 7AT upgrades, Fast Intentions and Level 10. I think that AAM is releasing a Z into the wild shortly that will have twin turbos and an upgraded 7AT from Level 10. Fast Intentions, on the other hand, has said they will release their 7AT upgrade "soon". I'm not really sure how "soon" is.
I've been kicking around the idea of using a GM transmission, but I'm waiting to see what comes of L10 and F.I. 7AT upgrade first.
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